Hail and Damaging Winds in Virginia, August 10, 2001

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
332 PM EDT FRI AUG 10 2001

BUSY AFTERNOON DEVELOPING. HEAT WAVE WILL GIVE WAY TO SOME SVR
ACTVTY...THEN A STATIONARY FRONT WILL LAST WELL INTO THE EXTENDED.
HEAT ADV EAST OF THE BLUE RIDGE...AND EXCSVE HEAT WARN FOR THE
CITIES WILL LIKELY CONT UNTIL THE NEXT UPDATE.

TSTSM ACTVTY HAS BEEN DISORGNZED FOR THE MOST PART SO FAR.  INSTAB
IS VERY HIGH BUT SHR IS LOW. STATNTY CELLS DEF HAVE THE POTNTL FOR
FLSH FLDDNG WITH HIGH PRECIP H20.

STAT FRONT WILL WAVER AS SMALL IMPLSES MOVE NE ALONG IT. GENRNLY
WILL BE A CHC OF SHRA AND TSRA FOR MOST OF THE EXNDED.

STRONG
FCSTID = 78
DCA   74  88  73  88 /  50  50  40  40
BWI   72  87  71  87 /  50  50  40  40
MRB   71  86  67  85 /  40  40  40  30
IAD   72  87  71  87 /  50  50  40  40
CHO   72  87  71  87 /  50  50  40  40
HGR   70  85  66  84 /  40  40  40  30
NHK   74  87  71  87 /  60  50  40  40
W99   71  86  67  85 /  40  40  40  30

.LWX...
DC...EXCESSIVE HEAT WARNING FOR THIS AFTERNOON AND EVENING FOR ZONE
DCZ001.

MD...EXCESSIVE HEAT WARNING FOR THIS AFTERNOON AND EVENING FOR ZONE
MDZ011.

HEAT ADVISORY FOR THIS AFTERNOON AND EVENING FOR ZONES MDZ004>007...
MDZ009>010...MDZ013>014...MDZ016>018.

VA...HEAT ADVISORY FOR THIS AFTERNOON AND EVENING FOR ZONES
VAZ036>042...VAZ050>057.

WV...NONE.

DCZ001-MDZ002>007-009>011-013-014-016>018-VAZ021-025>031-036>042-
050>057-WVZ048>055-102000-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
1030 AM EDT FRI AUG 10 2001

...THREAT OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING...

THE STORM PREDICTION CENTER HAS INDICATED THERE IS A SLIGHT RISK OF
SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING ACROSS MUCH OF
MARYLAND...THE DISTRICT OF COLUMBIA...NORTHERN VIRGINIA...AND THE
EASTERN WEST VIRGINIA PANHANDLE. THERE IS THE CHANCE THAT SOME OF
THESE THUNDERSTORMS MAY PRODUCE DAMAGING WIND GUSTS.

A COLD FRONT ACROSS THE SOUTHERN GREAT LAKES AND MIDWEST STATES THIS
MORNING WILL MOVE SOUTHEAST TOWARDS THE REGION AND PROVIDE A FOCUS
FOR A LINE OF THUNDERSTORMS TO DEVELOP.

SINCE THIS IS A VERY HUMID AIRMASS AHEAD OF THE FRONT...THERE WILL
BE PLENTY OF MOISTURE AVAILABLE FOR THE STORMS. AS A RESULT...ANY
THUNDERSTORM WILL BE CAPABLE OF PRODUCING TORRENTIAL DOWNPOURS. ONE
TO TWO INCHES OF RAIN IN LESS THAN AN HOUR IS POSSIBLE.  RESIDENTS
SHOULD BE PREPARED FOR LOCAL PONDING OF WATER ON ROADWAYS IN
ADDITION TO THE POSSIBILITY OF SCATTERED STORM DAMAGE OR POWER
OUTAGES.

STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER
DETAILS OR UPDATES.  ON THE WEB...WEATHER INFORMATION CAN BE FOUND
AT HTTP://WWW.NWS.NOAA.GOV/ER/LWX.

STRONG/HTS

DCZ001-MDZ013-014-101815-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
211 PM EDT FRI AUG 10 2001

...SCATTERED THUNDERSTORMS DEVELOPING ACROSS THE DISTRICT OF COLUMBIA
INTO CENTRAL MARYLAND...

AT 210 PM DOPPLER WEATHER RADAR INDICATED SCATTERED THUNDERSTORMS
DEVELOPING FROM THE DISTRICT OF COLUMBIA EASTWARD ACROSS NORTHERN
PRINCE GEORGES COUNTY MARYLAND INTO CENTRAL ANNE ARUNDEL COUNTY.

THE THUNDERSTORMS ARE MOVING EAST-NORTHEAST AT 15 TO 20 MPH AND WILL
AFFECT THE DISTRICT OF COLUMBIA...NORTHERN AND CENTRAL PRINCE
GEORGES COUNTY AND ANNE ARUNDEL COUNTY DURING THE NEXT HOUR.

THUNDERSTORMS COULD PRODUCE HEAVY RAIN...LIGHTNING AND WIND GUSTS TO
40 MPH.

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER.

DMW

DCZ001-MDZ013-014-VAZ053-054-101830-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
228 PM EDT FRI AUG 10 2001

AT 225 PM DOPPLER WEATHER RADAR INDICATED SCATTERED THUNDERSTORMS
EXTENDING FROM FAIRFAX CITY VIRGINIA ACROSS ARLINGTON COUNTY AND
WASHINGTON DC INTO NORTHERN PRINCE GEORGES THEN EASTWARD TO NEAR
CROFTON AND ARNOLD IN ANNE ARUNDEL COUNTY.

THESE STORMS WERE MOVING EAST-NORTHEAST AT 15 TO 20 MPH AND WILL
LIKELY PRODUCE HEAVY RAIN...LIGHTNING AND WIND GUSTS TO 40 MPH.

IF THREATENING WEATHER APPROACHES...SEEK SAFE SHELTER.

DMW

DCZ001-MDZ013-014-VAZ053-054-101945-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
254 PM EDT FRI AUG 10 2001

AT 250 PM DOPPLER WEATHER RADAR INDICATED SCATTERED THUNDERSTORMS
EXTENDING FROM FAIRFAX CITY VIRGINIA ACROSS ARLINGTON COUNTY AND
WASHINGTON DC INTO NORTHERN PRINCE GEORGES COUNTY THEN EASTWARD
TO NEAR CROFTON AND ARNOLD IN ANNE ARUNDEL COUNTY.

THE INDIVIDUAL STORMS WERE MOVING EAST-NORTHEAST AT 15 TO 20 MPH
BUT THE LINE OF STORMS WAS NEARLY STATIONARY. THESE THUNDERSTORMS
WILL PRODUCE HEAVY RAIN...LIGHTNING AND WIND GUSTS TO 40 MPH.

HEAVY RAIN MAY RESULT IN FLOODING OF LOW LYING AND POOR DRAINAGE
AREAS. NEVER TRY TO CROSS A FLOODED ROAD. THE WATER DEPTH MAY BE
TOO GREAT TO CROSS SAFELY.

IF THREATENING WEATHER APPROACHES...SEEK SAFE SHELTER.

DMW

DCZ001-MDZ006-007-011-013-014-VAZ026>031-038>042-051>054-102100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
410 PM EDT FRI AUG 10 2001

AT 405 PM DOPPLER WEATHER RADAR INDICATED SCATTERED THUNDERSTORMS
EXTENDING FROM EASTERN FAIRFAX COUNTY ACROSS ARLINGTON...THE
DISTRICT OF COLUMBIA...PRINCE GEORGES COUNTY AND ANNE ARUNDEL
COUNTY. THESE STORMS ARE MOVING EAST AT 20 MPH AND WILL AFFECT THE
AREA BETWEEN WASHINGTON DC AND THE CHESAPEAKE BAY DURING THE NEXT
HOUR OR SO.

ADDITIONAL THUNDERSTORMS WERE INDICATED OVER PORTIONS OF THE
SHENANDOAH VALLEY. THESE THUNDERSTORMS WERE MOVING EASTWARD AND WILL
MOVE INTO THE WESTERN SUBURBS OF WASHINGTON DC DURING THE NEXT HOUR
OR SO.

THUNDERSTORMS THIS EVENING WILL BE CAPABLE OF PRODUCING STRONG
WINDS...HEAVY RAIN AND LIGHTNING. HEAVY RAIN MAY PRODUCE FLOODING OF
LOW LYING AND POOR DRAINAGE AREAS.  NEVER TRY TO CROSS A FLOODED
ROAD. THE WATER DEPTH MAY BE TOO GREAT TO CROSS SAFELY.

IF THREATENING WEATHER APPROACHES YOUR AREA...SEEK SHELTER.

WALSTON